Higher mileage gz250?

[Kyguylal]

Hello. I am looking into buying my first bike this weekend. I have come across a few honda rebels and a few gz250s.

One bike is a 2006 gz250 with 12k on it. Seems to be well taken care of. New tires and had an oil change last week.

My question regards the life of the engines. Is 12k considered to be towards the end of the bikes life? I know there are many variables, but should I pass due to the higher miles than some of the rebels I'm seeing?

Also what would be a fair price for said bike?

Thanks everyone